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Is Lora maximum transmission 1 km in real?

I’m new to wireless communication and Lora. I’m using Lora Ra-02 and Arduino UNO and small 800 Mhz antenna. I’m using Arduino website library. How can I increase that range? What do I need to do to get that 2-3 km urban range? Does it need line of sight even in short distance communication? What […]